Indoor unit of air-conditioning apparatus

ABSTRACT

An indoor unit of an air-conditioning apparatus includes a main body, the main body including a back case shaped like a box and provided with an open front face, and a front case joined to the front face of the back case, wherein on a bottom face of the front case, at a location away from a joining portion between the back case and the front case, a step is formed protruding downward.

CROSS REFERENCE TO RELATED APPLICATION

This application is a U.S. national stage application of International Application No. PCT/JP2015/073613, filed on Aug. 21, 2015, the contents of which are incorporated herein by reference.

TECHNICAL FIELD

The present invention relates to an indoor unit of an air-conditioning apparatus, the indoor unit being installed on a wall surface

BACKGROUND

Conventionally, an indoor unit of an air-conditioning apparatus which has been proposed includes, for example, a frame body serving as a framework; and side panels, a front open/close panel, an L-shaped panel, and a bottom panel installed on faces of the frame body, wherein the bottom panel protrudes below a bottom face of the frame body (see, for example, Patent Literature 1).

Patent Literature

Patent Literature 1: Japanese Patent No. 5388998

In installing an indoor unit of an air-conditioning apparatus on a wall surface, the indoor unit is fixed to the wall surface by hooking a back face of a main body of the indoor unit to a mounting plate mounted on the wall surface. In such an installation operation, with an upper part of the indoor unit hooked to the mounting plate, an operator raises a lower part of the indoor unit in a direction away from the wall surface. Then, with the indoor unit kept raised from the wall surface by placing a stay rod for installation between a bottom face of the indoor unit and the wall surface, the operator performs an operation such as pipe connection work.

However, with the indoor unit of an air-conditioning apparatus that is described in Patent Literature 1, a joining portion between the bottom panel and frame body protrudes below the bottom face of the frame body, and thus will be hit by hands of the operator, the stay rod for installation, or other tools during an installation operation. Consequently, there is a problem in that forces will be exerted on the joining portion between the bottom panel and frame body, causing the bottom panel to come off the frame body.

SUMMARY

The present invention has been made to solve the above problem and has an object to provide an indoor unit of an air-conditioning apparatus, where the indoor unit can improve working efficiency in installing the indoor unit on a wall surface.

An embodiment of the present invention provides an indoor unit of an air-conditioning apparatus, the indoor unit comprising a back case shaped like a box and provided with an open front face, and a front case joined to the front face of the back case, wherein on a bottom face of the front case, at a location away from a joining portion between the back case and the front case, a step is formed protruding downward.

On the indoor unit of an air-conditioning apparatus according to an embodiment of the present invention, a step protruding downward is formed at such a location on the bottom face of the front case that is away from a joining portion between the back case and the front case.

This allows an operator to raise the indoor unit by hooking his/her fingers behind the step when installing the indoor unit on a wall surface. Also, with the indoor unit raised, a stay rod or another tool for installation can be placed between the step and wall surface, keeping the indoor unit in the raised state. This makes it possible to improve working efficiency in installing the indoor unit on the wall surface.

Also, it is possible to keep any force from being exerted on the joining portion between the back case and the front case, and thereby keep the front case from coming off the back case.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a perspective view showing external appearance of an indoor unit of an air-conditioning apparatus according to Embodiment 1.

FIG. 2 is an exploded view schematically showing a side face of the indoor unit of FIG. 1.

FIG. 3 is a diagram schematically showing a back face of the indoor unit of FIG. 1.

FIG. 4 is a diagram schematically showing a longitudinal section of the indoor unit of FIG. 1.

FIG. 5 is a diagram explaining a method for installing the indoor unit of the air-conditioning apparatus according to Embodiment 1.

FIG. 6 is a longitudinal section schematically showing a step on the indoor unit of an air-conditioning apparatus according to Embodiment 1.

FIG. 7 is a longitudinal section explaining an air current in the indoor unit of an air-conditioning apparatus according to Embodiment 1.

FIG. 8 is an enlarged view of principal part in FIG. 7.

FIG. 9 is a longitudinal section schematically showing Variation 1 of the indoor unit of an air-conditioning apparatus according to Embodiment 1.

FIG. 10 is a longitudinal section explaining an air current in Variation 1 of the indoor unit of an air-conditioning apparatus according to Embodiment 1.

FIG. 11 is a rear view schematically showing Variation 2 of the indoor unit of an air-conditioning apparatus according to Embodiment 1.

FIG. 12 is a longitudinal sectional view schematically showing Variation 3 of the indoor unit of an air-conditioning apparatus according to Embodiment 1.

FIG. 13 is a longitudinal section schematically showing a step on an indoor unit of an air-conditioning apparatus according to Embodiment 2.

FIG. 14 is a longitudinal section schematically showing Variation 1 of the indoor unit of an air-conditioning apparatus according to Embodiment 2.

FIG. 15 is a longitudinal sectional view showing Variation 2 of the indoor unit of an air-conditioning apparatus according to Embodiment 2.

DETAILED DESCRIPTION Embodiment 1

A configuration of an indoor unit of an air-conditioning apparatus according to Embodiment 1 will be described below with reference to drawings. Note that in the following description, the indoor unit of an air-conditioning apparatus will be referred to simply as the “indoor unit.”

FIG. 1 is a perspective view showing external appearance of the indoor unit of an air-conditioning apparatus according to Embodiment 1. FIG. 2 is an exploded view schematically showing a side face of the indoor unit of FIG. 1.

A main body 1 of the indoor unit is installed on a wall surface 11 a of a room 11 to be air-conditioned. The main body 1 includes a front case 1 e and a back case 1 f. The back case 1 f is formed in a box shape with an open front face. The front case 1 e is joined to the front face of the back case 1 f. For example, a rear side of the front case 1 e and the back case 1 f are fitted together. Note that the method for joining together the front case 1 e and back case 1 f is not limited to this. For example, the front case 1 e and back case 1 f may be joined together by bonding or by screwing.

A front grille 6 is attached to the main body 1 on the side of a front face 1 a. The front grille 6 is detachably attached to the front case 1 e. In the front grille 6, an air inlet port 2 a, which is an opening port through which air is passed, is formed in a width direction of the main body 1. In the front case 1 e, an upper air inlet 2 b, which is an opening port through which air is passed, is formed on the side of a top face 1 b.

An air outlet 3 through which air is blown out is formed in a lower part including a bottom face 1 eb of the front case 1 e. A lower part of the air outlet 3 in the front case 1 e is formed by a lower jaw 10 a. That is, the lower jaw 10 a is formed integrally with the front case 1 e, making up a lower end of the front case 1 e on the rear side. The lower jaw 10 a is joined to the back case 1 f. Note that the lower jaw 10 a may be constructed separately from the front case 1 e. A horizontal louver 4 a and after-mentioned vertical louvers 4 b are provided in the air outlet 3.

A step 50 is formed at such a location on the bottom face 1 eb of the front case 1 e, protruding downward. The step 50 is formed at a location away from a joining portion 10 b between the back case 1 f and front case 1 e.

On the side of a back face 1 d, the back case 1 f is mounted on the wall surface 11 a. On the side of a top face 1 b, the upper air inlet 2 b adapted to pass air therethrough is formed in the back case 1 f. Also, a guide wall 10 is formed inside the back case 1 f.

FIG. 3 is a diagram schematically showing a back face of the indoor unit of FIG. 1

As shown in FIG. 3, the step 50 formed on the bottom face 1 eb of the front case 1 e, protrudes below a bottom face 1 fb of the back case 1 f. Also, the step 50 is formed extending along a width direction of the front case 1 e.

FIG. 4 is a diagram schematically showing a longitudinal section of the indoor unit of FIG. 1.

As shown in FIG. 4, a fan 8 adapted to send air is disposed in the main body 1. The fan 8 sucks air into an inlet-side flow path E1 through the air inlet port 2 a and upper air inlet 2 b and blows out the air into an outlet-side flow path E2 on the side of the air outlet 3. The fan 8 can be, for example, any of a cross-flow fan, axial fan, and other fans. A heat exchanger 7 adapted to exchange heat between refrigerant and air is disposed on an upstream side of the fan 8. A filter 5 adapted to remove dust is disposed behind the air inlet port 2 a and upper air inlet 2 b but in front of the heat exchanger 7. In the back case 1 f, a spiral-shaped guide wall 10 is formed on an outlet side of the fan 8. Refrigerant pipes 12 connected to the outdoor unit are housed between the guide wall 10 and back face 1 d.

A tongue 9 a adapted to separate the inlet-side flow path E1 and outlet-side flow path E2 is formed on the front case 1 e. Also, on a front side of the tongue 9 a in the front case 1 e, a drain pan 9 b is formed to temporarily store drops of water dripping from the heat exchanger 7. Also, the horizontal louver 4 a pivotal in an up/down direction and the vertical louvers 4 b pivotal in a left-right direction are provided in the air outlet 3. The air outlet 3 is open downward on the side of the front face 1 a of the main body 1. A top wall of the air outlet 3 is made up of a diffuser 3 a of the tongue 9 a and sidewalls of the air outlet 3 are made up of vertical planes extending in a manner continuous with the diffuser 3 a. Also, a bottom face of the air outlet 3 is made up of the guide wall 10 and a downstream end of the air outlet 3 is made up of the lower jaw 10 a.

Next, a method for installing the indoor unit on the wall surface 11 a of the room 11 will be described.

FIG. 5 is a diagram explaining a method for installing the indoor unit of the air-conditioning apparatus according to Embodiment 1.

Note that in FIG. 5, a lower part of the indoor unit is shown as being raised in a direction away from the wall surface 11 a. Note that FIG. 5 schematically shows a longitudinal section of the main body 1.

As shown in FIG. 5, in installing the indoor unit on the wall surface 11 a, a mounting plate 13 is mounted on the wall surface 11 a in advance. Then, by hooking the back face 1 d of the main body 1 of the indoor unit to the mounting plate 13, the indoor unit is hung on the wall surface 11 a.

To raise the lower part of the indoor unit in the direction away from the wall surface 11 a, with an upper part of the indoor unit on the side of the back face 1 d hooked to the mounting plate 13, the operator raises the indoor unit by hooking his/her fingers behind the step 50 formed on the bottom face 1 eb of the front case 1 e.

Then, with the indoor unit raised, a stay rod 14 or another tool for installation is mounted between the step 50 and wall surface 11 a, keeping the indoor unit raised from the wall surface 11 a.

With the indoor unit raised from the wall surface 11 a, the operator does work such as connecting pipes and wires to the outdoor unit.

Subsequently, the operator removes the stay rod 14 for installation placed between the step 50 on the indoor unit and wall surface 11 a, moves the indoor unit toward the wall surface 11 a by hooking his/her fingers behind the step 50 formed on the bottom face 1 eb of the front case 1 e, and fixes the main body 1 of the indoor unit to the mounting plate 13.

Next, a detailed configuration of the step 50 formed on the bottom face 1 eb of the front case 1 e will be described.

FIG. 6 is a longitudinal section schematically showing the step on the indoor unit of an air-conditioning apparatus according to Embodiment 1. Note that FIG. 6 shows an enlargement of a longitudinal section at the position of the air outlet 3 in the main body 1. Note that the left-to-right direction in FIG. 6 corresponds to the depth direction of the main body 1 of the indoor unit while the vertical direction in FIG. 6 corresponds to the height direction of the main body 1.

As shown in FIG. 6, the step 50 is formed on the bottom face 1 eb of the front case 1 e, protruding downward. Desirably a height Hd of the step 50 is about high enough to be gripped by operators fingers. Also, desirably the height Hd of the step 50 is about high enough to be propped by the stay rod 14 or another tool for installation. Preferably the height Hd of the step 50 is 4 mm or above. On the other hand, if the height Hd of the step 50 is too large, size of the main body 1 will increase. Also, if the height Hd of the step 50 is too large, degradation of design will occur. Thus, desirably the height Hd of the step 50 is not too large. Preferably the height Hd of the step 50 is 10 mm or below. Thus, in the indoor unit of an air-conditioning apparatus according to Embodiment 1, the height Hd of the step 50 is set to be between 4 mm and 10 mm, both inclusive. Also, the step 50 is formed at a location away from the joining portion 10 b between the back case 1 f and front case 1 e. Desirably a distance Ld between the step 50 and joining portion 10 b is such that the operator's fingers or the stay rod 14 or another tool for installation will not touch the joining portion 10 b between the back case 1 f and front case 1 e. Preferably the distance Ld between the step 50 and joining portion 10 b is 10 mm or above.

Also, between the step 50 and a tip 10 a 1 of the lower jaw 10 a, a bottom face of the lower jaw 10 a includes a flat portion 10 a 2 formed into a flat shape. That is, the flat portion 10 a 2 is formed on the bottom face 1 eb of the front case 1 e, extending a predetermined distance between the step 50 and air outlet 3. Note that the entire area between the step 50 and the tip 10 a 1 of the lower jaw 10 a does not need to be flat, and it is enough that at least part of the area is flat.

Next, operation of the flat portion 10 a 2 formed between the step 50 and air outlet 3 will be described.

FIG. 7 is a longitudinal section explaining an air current in the indoor unit of an air-conditioning apparatus according to Embodiment 1. FIG. 8 is an enlarged view of principal part in FIG. 7. Note that FIGS. 7 and 8 schematically show a longitudinal section at the position of the air outlet 3 in the main body 1.

As shown in FIG. 7, the air blown out into the outlet-side flow path E2 by the fan 8 is led to the air outlet 3 by the guide wall 10 and blown out as outlet airflow 20 through the air outlet 3. The outlet airflow 20 induces air in the room 11, and thereby produces induced airflow 30 flowing from the side of the wall surface 11 a to the side of the air outlet 3 in a lower part of the main body 1. Then, the induced airflow 30 joins the outlet airflow 20.

As shown in FIG. 8, the induced airflow 30 flows along the bottom face 1 fb of the back case 1 f and the bottom face 1 eb of the front case 1 e. Then, when the induced airflow 30 hits the step 50, part of the induced airflow 30 flows downward. That is, the induced airflow 30 turns downward at the step 50 spaced away from the tip 10 a 1 of the lower jaw 10 a by a distance equivalent to a length of the flat portion 10 a 2. Consequently, the induced airflow 30 gradually joins the outlet airflow 20 at a location below the tip 10 a 1 of the lower jaw 10 a.

As described above, according to Embodiment 1, the indoor unit includes the main body 1, the main body 1 including the back case 1 f shaped like a box and provided with an open front face, and a front case 1 e joined to the front face of the back case 1 f, wherein on the bottom face 1 eb of the front case 1 e, at a location away from the joining portion 10 b between the back case 1 f and the front case 1 e, the step 50 is formed protruding downward.

Therefore, when installing the indoor unit on the wall surface 11 a, the operator can raise the indoor unit by hooking his/her fingers behind the step 50. Also, with the indoor unit raised, the stay rod 14 or another tool for installation can be placed between the step 50 and wall surface 11 a, keeping the indoor unit raised from the wall surface 11 a. This makes it possible to improve the working efficiency in installing the indoor unit on the wall surface 11 a. This in turn makes it possible to prevent pipe connection errors and other errors made by the operator. Also, since the indoor unit is kept raised by the stay rod 14 or another tool for installation, an installation operation can be performed by a single operator.

Also, it is possible to keep any force from being exerted on the joining portion 10 b between the back case 1 f and the front case 1 e, and thereby keep the front case 1 e from coming off the back case 1 f.

Also, according to Embodiment 1, the step 50 is formed extending along the width direction of the front case 1 e.

Consequently, the operator can hook his/her fingers behind the step 50 at any position in the width direction of the main body 1 of the indoor unit. Also, the stay rod 14 for installation can be placed at any position in the width direction of the main body 1 of the indoor unit.

Also, according to Embodiment 1, the height Hd of the step 50 is between 4 mm and 10 mm, both inclusive.

This allows the operator to raise the indoor unit from the wall surface 11 a by hooking his/her fingers behind the step 50. Also, the indoor unit can be kept raised from the wall surface 11 a with the step 50 being propped by the stay rod 14 or another tool for installation.

Also, according to Embodiment 1, the step 50 is formed at a location 10 mm or more away from the joining portion 10 b.

This makes it possible to keep any force from being exerted on the joining portion 10 b between the back case 1 f and the front case 1 e and thereby keep the front case 1 e from coming off the back case 1 f.

Also, according to Embodiment 1, between the step 50 and air outlet 3, the bottom face 1 eb of the front case 1 e includes the flat portion 10 a 2 formed into a flat shape.

Consequently, part of the induced airflow 30 can be caused to turn downward at the step 50 spaced away from the tip 10 a 1 of the lower jaw 10 a by a distance equivalent to a length of the flat portion 10 a 2. Thus, part of the induced airflow 30 can be mixed with the outlet airflow 20 below the tip 10 a 1 of the lower jaw 10 a, making it possible to reduce a volume of the induced airflow 30 joining the outlet airflow 20 at the tip 10 a 1 of the lower jaw 10 a.

This makes it possible to inhibit condensation on the lower jaw 10 a during cooling operation. That is, an amount of moisture condensing from air in the induced airflow 30 at the tip 10 a 1 of the lower jaw 10 a can be reduced, making it possible to reduce an amount of condensation collecting on the lower jaw 10 a.

Note that only part of the step 50 may be formed at a location spaced away from the joining portion 10 b. For example, the step 50 extending along the width direction of the front case 1 e may include a portion spaced away from the joining portion 10 b in the depth direction and a portion that coincides with the joining portion 10 b in the depth direction. In that case, that portion of the step 50 that is spaced away from the joining portion 10 b in the depth direction achieves effects similar to those described above.

Variation 1

FIG. 9 is a longitudinal section schematically showing Variation 1 of the indoor unit of an air-conditioning apparatus according to Embodiment 1.

The shape of the step 50 is not limited to a shape protruding vertically downward, and may be any shape. For example, as shown in FIG. 9, the step 50 may be shaped to slope to a front side of the main body 1. Also, a section of the step 50 is not limited to a rectilinear shape, and may be formed in a curvilinear shape. That is, the step 50 may have any shape as long as the step 50 can be gripped by operator's fingers and propped by the stay rod 14 or another tool for installation.

This configuration also achieves effects similar to those described above.

FIG. 10 is a longitudinal section explaining an air current in Variation 1 of the indoor unit of an air-conditioning apparatus according to Embodiment 1.

As shown in FIG. 10, again in Variation 1, between the step 50 and air outlet 3, the bottom face 1 eb of the front case 1 e includes a flat portion 10 a 2 formed into a flat shape.

Consequently, part of the induced airflow 30 can be caused to turn downward at the step 50 spaced away from the tip 10 a 1 of the lower jaw 10 a by a distance equivalent to a length of the flat portion 10 a 2.

This configuration also achieves effects similar to those described above.

Variation 2

FIG. 11 is a rear view schematically showing Variation 2 of the indoor unit of an air-conditioning apparatus according to Embodiment 1.

A length of the step 50 in the width direction of the front case 1 e may be shorter than the width of the front case 1 e. Also, plural steps 50 may be formed in the width direction of the front case 1 e.

For example, as shown in FIG. 11, two steps 50 shorter than the width of the front case 1 e may be formed being spaced away from each other. The length of the step 50 in the width direction may be set to be, for example, at least approximately equal to the width of one finger of the operator. Also, if the two steps 50 are provided near left and right ends of the front case 1 e in the width direction, the operator can hook fingers of both hands behind the steps 50.

This configuration also achieves effects similar to those described above.

Variation 3

FIG. 12 is a longitudinal sectional view schematically showing Variation 3 of the indoor unit of an air-conditioning apparatus according to Embodiment 1.

As shown in FIG. 12, instead of the step 50 described above, a groove 60 recessed above a lower end of the joining portion 10 b may be formed in the bottom face 1 eb of the front case 1 e.

That is, the indoor unit of an air-conditioning apparatus according to Variation 3 includes a main body 1, the main body 1 including a back case 1 f shaped like a box and provided with an open front face, and a front case 1 e joined to the front face of the back case 1 f, wherein in the bottom face 1 eb of the front case 1 e, at a location away from the joining portion 10 b between the back case 1 f and the front case 1 e, the groove 60 is formed being recessed above.

This configuration also allows operator's fingers or the stay rod 14 or another tool for installation to be applied to the groove 60 and achieves effects similar to those described above.

Embodiment 2

In Embodiment 2, a configuration in which a step 50 is formed on the bottom face 1 fb of the back case 1 f will be described.

Note that the same components as those in Embodiment 1 are denoted by the same reference numerals as the corresponding components in Embodiment 1. Description will be given below by focusing on differences from Embodiment 1 described above.

FIG. 13 is a longitudinal section schematically showing a step on an indoor unit of an air-conditioning apparatus according to Embodiment 2. Note that the left-to-right direction in FIG. 13 corresponds to the depth direction of the main body 1 of the indoor unit while the vertical direction in FIG. 6 corresponds to the height direction of the main body 1.

As shown in FIG. 13, the step 50 is formed on the bottom face 1 fb of the back case 1 f, protruding downward. The step 50 is formed at a location away from the joining portion 10 b between the back case 1 f and front case 1 e. For example, the height Hd of the step 50 is set to be between 4 mm and 10 mm, both inclusive. Also, the distance Ld between the step 50 and joining portion 10 b is set to 10 mm or above.

As described above, according to Embodiment 2, the indoor unit includes the main body 1, the main body 1 including the back case 1 f shaped like a box and provided with an open front face, and the front case 1 e joined to the front face of the back case 1 f, wherein on the bottom face 1 fb of the back case 1 f, at a location away from the joining portion 10 b between the back case 1 f and the front case 1 e, the step 50 is formed protruding downward.

Therefore, when installing the indoor unit on the wall surface 11 a, the operator can raise the indoor unit by hooking his/her fingers behind the step 50. Also, with the indoor unit raised, the stay rod 14 or another tool for installation can be placed between the step 50 and wall surface 11 a, keeping the indoor unit raised from the wall surface 11 a. This makes it possible to improve the working efficiency in installing the indoor unit on the wall surface 11 a. This in turn makes it possible to prevent pipe connection errors and other errors made by the operator. Also, since the indoor unit is kept raised by the stay rod 14 or another tool for installation, an installation operation can be performed by a single operator.

Also, it is possible to keep any force from being exerted on the joining portion 10 b between the back case 1 f and the front case 1 e, and thereby keep the front case 1 e from coming off the back case 1 f.

Also, according to Embodiment 2, the height Hd of the step 50 is between 4 mm and 10 mm, both inclusive.

This allows the operator to raise the indoor unit from the wall surface 11 a by hooking his/her fingers behind the step 50. Also, the indoor unit can be kept raised from the wall surface 11 a with the step 50 being propped by the stay rod 14 or another tool for installation.

Also, according to Embodiment 2, the step 50 is formed at a location 10 mm or more away from the joining portion 10 b.

This makes it possible to keep any force from being exerted on the joining portion 10 b between the back case 1 f and the front case 1 e and thereby keep the front case 1 e from coming off the back case 1 f.

Note that the step 50 may be formed extending along a width direction of the back case 1 f.

Consequently, the operator can hook his/her fingers behind the step 50 at any position in the width direction of the main body 1 of the indoor unit. Also, the stay rod 14 for installation can be placed at any position in the width direction of the main body 1 of the indoor unit.

Note that a length of the step 50 in the width direction of the back case 1 f may be shorter than the width of the back case 1 f. Also, plural steps 50 may be formed in the width direction of the back case 1 f.

For example, two steps 50 shorter than the width of the back case 1 f may be formed being spaced away from each other. The length of the step 50 in the width direction may be set to be, for example, at least approximately equal to the width of one finger of the operator. Also, if the two steps 50 are provided near left and right ends of the back case 1 f in the width direction, the operator can hook fingers of both hands behind the steps 50.

Note that only part of the step 50 may be formed at a location spaced away from the joining portion 10 b. For example, the step 50 extending along the width direction of the back case 1 f may include a portion spaced away from the joining portion 10 b in the depth direction and a portion that coincides with the joining portion 10 b in the depth direction. In that case, that portion of the step 50 that is spaced away from the joining portion 10 b in the depth direction achieves effects similar to those described above.

Variation 1

FIG. 14 is a longitudinal section schematically showing Variation 1 of the indoor unit of an air-conditioning apparatus according to Embodiment 2.

The shape of the step 50 formed on the bottom face 1 fb of the back case 1 f is not limited to a shape protruding vertically downward, and may be any shape.

For example, as shown in FIG. 14, the step 50 may be shaped to slope to a front side of the main body 1. Also, a section of the step 50 is not limited to a rectilinear shape, and may be formed in a curvilinear shape. That is, the step 50 may have any shape as long as the step 50 can be gripped by operators fingers and propped by the stay rod 14 or another tool for installation.

This configuration also achieves effects similar to those described above.

Variation 2

FIG. 15 is a longitudinal sectional view showing Variation 2 of the indoor unit of an air-conditioning apparatus according to Embodiment 2.

As shown in FIG. 15, instead of the step 50 described above, a groove 60 recessed above a lower end of the joining portion 10 b may be formed in the bottom face 1 fb of the back case 1 f.

That is, the indoor unit of an air-conditioning apparatus according to Variation 2 includes a main body 1, the main body 1 including a back case 1 f shaped like a box and provided with an open front face, and a front case 1 e joined to the front face of the back case 1 f, wherein in the bottom face 1 fb of the back case 1 f, at a location away from the joining portion 10 b between the back case 1 f and the front case 1 e, the groove 60 is formed being recessed above.

This configuration also allows operators fingers or the stay rod 14 or another tool for installation to be applied to the groove 60 and achieves effects similar to those described above. 

1. An indoor unit of an air-conditioning apparatus, the indoor unit comprising a main body, the main body including: a back case shaped like a box and provided with an open front face, and a front case joined to the front face of the back case, wherein a bottom face of the front case has a step formed thereon, the step being formed at a location away from a joining portion between a bottom face of the back case and the bottom face of the front case, the step protruding downward.
 2. The indoor unit of an air-conditioning apparatus of claim 1, wherein the step is formed extending along a width direction of the front case.
 3. The indoor unit of an air-conditioning apparatus of claim 1, wherein a length of the step in a width direction of the front case is shorter than a width of the front case.
 4. The indoor unit of an air-conditioning apparatus of claim 1, wherein a plurality of the steps are formed in a width direction of the front case.
 5. The indoor unit of an air-conditioning apparatus of claim 1, further comprising a fan provided inside the main body, wherein an air outlet adapted to blow out air sent from the fan is formed in the bottom face of the front case, and between the step and the air outlet, the bottom face of the front case includes a flat portion formed into a flat shape.
 6. An indoor unit of an air-conditioning apparatus, the indoor unit comprising a main body, the main body including: a back case shaped like a box and provided with an open front face, and a front case joined to the front face of the back case, wherein a bottom face of the back case has a step formed thereon, at a location away from a joining portion between the bottom face of the back case and a bottom face of the front case, the step protruding downward.
 7. The indoor unit of an air-conditioning apparatus of claim 6, wherein the step is formed extending along a width direction of the back case.
 8. The indoor unit of an air-conditioning apparatus of claim 6, wherein a length of the step in a width direction of the back case is shorter than a width of the back case.
 9. The indoor unit of an air-conditioning apparatus of claim 6, wherein a plurality of the steps are formed in a width direction of the back case.
 10. The indoor unit of an air-conditioning apparatus of claim 1, wherein a height of the step is between 4 mm and 10 mm, both inclusive.
 11. The indoor unit of an air-conditioning apparatus of claim 1, wherein the step is formed at a location 10 mm or more away from the joining portion.
 12. The indoor unit of an air-conditioning apparatus of claim 6, wherein a height of the step is between 4 mm and 10 mm, both inclusive.
 13. The indoor unit of an air-conditioning apparatus of claim 6, wherein the step is formed at a location 10 mm or more away from the joining portion. 